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New wheat varieties exhibit a high adaptive potential for productivity. The question of improving cultivation technologies, specifically sowing dates, optimised fertilisation systems, and micronutrient application, remains relevant to fully realise the genetic potential of these varieties under specific soil and climatic conditions. The aim of this study was to determine the influence of sowing dates, fertilisation, and foliar application of micronutrients on the yield and quality parameters of winter wheat grown in the Western Forest-Steppe zone. A field experiment was conducted on grey forest surface-gleyed soils during 2021-2023. The study evaluated the yield formation parameters and quality indicators of the winter wheat varieties Estafeta myronivska, Dovira odeska, and Akhim under sowing dates of 20 September, 5 October, and 20 October. It was determined that the yield and grain quality of the studied wheat varieties varied under the influence of sowing dates, fertilisation, and foliar micronutrient application. Sowing winter wheat on 5 October resulted in the highest yields over the years of the study: on average, 5.29 t/ha for the Estafeta myronivska, 4.78 t/ha for Dovira odeska, and 5.05 t/ha for Akhim. The highest productivity (5.83 t/ ha) was achieved by sowing Estafeta myronivska with N120P90K90 fertilisation and foliar application of the Aidamin complex. Across all wheat varieties, protein content, gluten content, and vitreousness increased from the earliest to the latest sowing dates. The findings of this study can be applied to enhance the productivity of winter wheat agroecosystems and produce high-quality grain under production conditions

Modern flax varieties have a high genetic potential for productivity, which can be realised by improving the elements of cultivation technology, in particular, the fertilisation system, which is why the study is relevant. The purpose of the study was to investigate the regularities of the development of productivity of common flax plants and determine changes in quality indicators depending on the application of improved agrotechnological techniques in the soil and climatic conditions of the Western Forest-Steppe. The following methods were used: field, laboratory (to determine qualitative indicators), and statistical (to assess the reliability of data). Field studies were conducted during 2021- 2023 on grey forest surface-gleyed soils. The features of growth and development of common flax varieties Miandr, Oberih, Usivskyi and Ivanivskyi were studied using the following fertiliser rates: N20P40K60; N30P60K90; N45P90K135. It was found that the productivity of common flax varied depending on the dose of mineral fertilisers and varietal characteristics. On average, in 2021-2023, the growing season of common flax lasted 91-94 days (depending on the variety and mineral nutrition of plants). The highest yield of flax straw (4.37 t/ha) was obtained on average for 2021-2023 in the Oberih variety, subject to the application of a dose of mineral fertilisers N30P60K90. The increase over control was 0.52 t/ha (13.51%). The yield of straw in the Miandr variety varied from 3.59 t/ha (in the control) to 4.31 t/ha (with the application of N45P90K135), for the Usivskyi variety – 3.97-4.17 t/ha, for the Ivanivskyi variety – 3.12-3.81 t/ha. In terms of seed yield, the highest indicators on average for 2021-2023 were obtained from the Miandr variety, provided that a dose of mineral fertilisers N45P90K135 was used – 1.26 t/ha. The control yield was 0.88 t/ha. A similar trend was observed in the Oberih variety with seed yield indicators of 0.93 t/ha and 0.58 t/ha in the control. The seed yield of the Miandr variety exceeded the indicator of the Oberih variety by 0.33 t/ha against the background of fertiliser N45P90K135. Against this background, fertilisation resulted in the highest seed yields in the varieties Usivskyi (0.99 t/ha) and Ivanivskyi (0.91 t/ha), which was 0.17 t/ha (20.73%) and 0.07 t/ha (8.33%) higher than the control variant, respectively. The results of these studies can be used to adjust the elements of the technology of growing common flax in production conditions to increase the yield and quality of fibre